activity-tracking: add search params to the pathname

[phndiaye]

What does this PR do?

activity-tracking: add search params to the pathname

What are the observable changes?

🧑‍💻 Developer Heads Up

⚡ Since we are using Ember Octane now:

• Feel free to migrate existing components to Glimmer Components.
• Write new ones exclusively in it.

Useful Resource : Ember Octane vs Classic Cheat Sheet

Good PR checklist

• Title makes sense
• Is against the correct branch
• Only addresses one issue
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• Added/updated tests
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[linear]

ENG-1933 Have Mixpanel parameters in "Page_views" events

Description

Requested by Marketing

When users creates an account on Wednesday, they need to be able to correlate source and usage (i.e. if someone's comes from organic ads or lead redirection) to understand which source led to more retention/usage.

We currently have UTM's added to the URLs when someone's comes from a Marketing entity, and we need to forward these UTM's to Mixpanel in the page_view event and most particularly for the first page view (when someone creates his Wednesday account).

This will let us creates cohort based on the UTMs parameters available in the URLS.

Capture d’écran 2023-11-21 à 15.47.38.png

Suggestion from product:

1. Have a dedicated attribute as we have for path and origin
2. Add UTM's at the end of the path

Technical Solution

Considering after a sign up we don't automatically redirect to the settings page but instead we display the Email confirmation overlay, we need to

Acceptance Criteria

• We properly have UTMs in the page_view event
• We properly have the UTMs from the account creation forwarded to the first page view (email confirmation page-